The HP OfficeJet Pro 1170 Cx uses two standard-capacity ink cartridges. Compatible HP 45 (51645A) is the black ink and yields about 1,100 pages. Compatible HP 23 (C1823D) is the tri-color ink and yields about 690 pages. The same ink also fits the OfficeJet Pro 1170, OfficeJet Pro 1175 and OfficeJet Pro 1175 Cx. Same-day shipping on most orders.
